Cutter-bar



(N0 Modl.)

G. B. CLARK.

CUTTER BAR.

No. 449,521. Patents Mar. 31, 1891.,

m VENTOI? Eoye3%1, BY 7 ATTORNEY.

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UNITED STATES PATENT OFFICE.

GEORGE E. CLARK, OF BETIIESDA, OIIIO.

CUTTER-BAR.

SPECIFICATION forming part of Letters Patent No. 449,521, dated March31, 1891.

Application filed October 25, 1890. Serial No. 369,334:- (No model.)

T0 whom it may concern.-

Be it known that I, GEORGE E. CLARK, a citizen of the United States, anda resident of Bethesda, in the county of Belmont and State of Ohio, haveinvented certain new and useful Improvements in Means for Fastening andTightening the Knives of Harvester Cutting Apparatus; and I do declarethe following to be a full, clear, and exact description of theinvention, such as will enable others skilled in the art to which itappertains to make and use the same, reference being had to theaccompanying drawings, and to the letters of reference marked thereon,which form a part of this specification.

Figure 1 of the drawings is a top plan view of the invention, alsoshowing; the lockingbar raised in dotted lines. Fig. 2 is a plan viewwith locking-bar removed. and Fig. 3 is a horizontal section.

The invention relates to improvements in means for fastening andtightening the knives in the cutting apparatus of harvesting and mowingmachines; and it consists in the novel construction and combination ofparts hereinafter fully described.

In the accompanying drawings, A repre sents the knifebar, which isprovided along its upper surface with a series of headed studs or pins(1-, projecting upwardly a short distance therefrom. These pins or studsa are so arranged that they will register with the slots or perforationsb in the knives B when the said parts are brought together. The slots orperforations Z1, two preferably in each knife, are located near theupper edge of the knife and extend in a direction parallel to theknife-bar. At one end these slots b are formed with an enlarged portion1;, adapted to receive the heads of the pins or studs a. The knives areplaced on the knifebar, the enlarged portions of the slots Z; receivin gthe headed pins or studs. The knives are then moved forwardly withreference to the knife-bar, so as to bring the narrow portion of theslots in engagement with the shanks of the pins or studs, the heads ofthe pins preventing vertical movement.

D represents the locking plate or bar, which consists of a metal plateor piece somewhat greater in length than the space occupied by theknives on the knife-bar and of suitable width and thickness. At one endthis piece or plate D is provided with a slot or perforation (1, similarto the slots 1) in the knives, except that the enlarged portion (1'thereof is at the opposite end of the slot. Near the opposite end aperforation c is provided, which is adapted to receive a set-screw orlockingpin, as will be hereinafter described. Intermediate of these endperforations the plate or bar D is provided with a series of slots f,running in from the forward edge or margin thereof, as shown. Theseslots are the same distance apart and correspond in number to the headedpins or studs a, with which they are adapted to register when the partsare brought into locking position and which they receive. The outer endpin or stud a is inserted in the enlarged portion d of the slot (Z ofthe bar or plate D and the said bar or plate moved endwise, so as tobring the narrow portion of the said slot in engagement with the shankof the pin. Said bar or plate is then brought forward, the pin a servingas a pivot, the perpendicular slots engaging the shanks of the pins orstuds Z) between the surface of the knives and the heads of the pins. Asthe bar is thus brought down to its lowest position, it will be seenthat it will draw the knives firmly and securely to their place. The barD is then secured in such position by the set-screw or locking-pin g,which enters the perforation c of said bar and engages the knife-bar. Inthis manner the knives will be securely held.

Having thus described the invention, what I claim, and I desire tosecure by Letters Patent, is

The fastening and tightening device for mower and harvester knives,comprising the longitudinal bar or plate D, adjustably pivotedat one endto the knife-bar and provided at its intermediate portion with thetransverse marginal slots f, in combination with the knife-bar havingthe headed pins or studs which engage and lock the knives in position,said studs or pins registering with and adapted to enter saidperforations or slots, and means for locking the parts in suchadjustment, substantially as specified.

In testimony whereof I affix my signature in presence of two witnesses.

GEORGE B. CLARK.

Witnesses:

WILLIAM T. BOLON, SILAS A. Down.

